Search for a quantum critical point in CeRhSi 3 via electrical resistivity: Part of Special Issue on Quantum Criticality and Novel Phases

We have verified an existence of a quantum critical point (QCP) in heavy‐fermion superconductor CeRhSi 3 under magnetic fields and pressures by using the electrical resistivity measurements. Firstly, we revealed magnetic field–temperature ( H – T ) phase diagrams at several pressures: below and above the pressure where the antiferromagnetic (AFM) order disappears in zero magnetic field. In a higher pressure, we determined the quantum‐phase‐transition field H M where the AFM transition temperature drops to zero. Recovery to Fermi liquid state is not clearly observed above H M . Therefore, H M is not conclusively determined as the QCP.